I have been considering one man crews as well. I have had two 2 man crews and then have cut back to one 2 man crew and one 1 man crew. The 1 man crew makes 33% more per man hour
Sometimes its difficult to find two guys that can work together anyway.
I'm thinking of 1/2 ton trucks, light custom single axle trailer just barely large enough to fit zeroturn and 36" WB. I would even consider a Ford Ranger if it had the courage to pull a trailer every day to help offset the extra fuel used.